<u>Answer</u>: 2. organelle
<em>A different </em>organelle<em> controls each step of glycolysis.</em>
<u>Explanation</u>:
The <em>process of glycolysis breaks down each glucose molecule into two pyruvate molecules</em>. The glucose molecule has 6 carbon atoms and the two pyruvates have 3 carbon atoms each.
<em>Glycolysis contains 10 steps and each one of the steps is controlled by different enzymes.</em>
<em>The enzymes controlling each of the 10 steps are given below</em>
<em>Step1- </em><em>hexokinase phosphorylates</em>
<em>Step 2-</em><em>ophosphoglucoismerase</em>
<em>Step 3-</em><em>phosphofructokinase</em>
<em>Step 4</em><em>-aldolase</em>
<em>Step 5-</em><em>triose phosphate isomerase</em>
<em>Step 6</em><em>-triose phosphate dehydrogenase</em>
<em>Step 7-</em><em>phosphoglycerokinase</em>
<em>Step 8-</em><em>phosphoglyceromutase</em>
<em>Step 9-</em><em>enolase</em>
<em>Step 10</em><em>-pyruvate kinase</em>